PEMS. The continuous rise of Real Driving Emissions. November 2017, Markus Böck (HORIBA GmbH) 2017 HORIBA, Ltd. All rights reserved

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1 PEMS The continuous rise of Real Driving Emissions November 2017, Markus Böck (HORIBA GmbH) 2017 HORIBA, Ltd. All rights reserved

2 Agenda Einführung Introduction Messprinzip RDE for LDV in EU Anwendung RDE for HD in EU Datennachbereitung RDE for HD in US Zusammenfassung RDE for NRMM in EU

3 1. Einführung Introduction

4 Introduction PEMS are not new! MEXA-1340AFM OBS-1000 OBS-ONE-GS OBS-ONE-PN MEXA-1440AFM Real world tests Real world tests and environmental modelling US / EU HDD, LDV regulation CFR 1065 Subpart J LDV regulation No 582/2011 (EU) MEXA-1360AFM Real world tests OBS-2x00 US HDD regulation CFR 1065 Subpart J No 582/2011 (EU) OBS-ONE-PM US HDD regulation CFR 1065 Subpart J 4

5 Introduction Application Certification LDV and HDV RDE LDV legislation (EU) US HDV legislation CFR 1065 Subpart J EU HDV legislation No 582 / 2011 (EU) 64 / / 1718 In-Service Conformity (ISC) Survey of exhaust gas values during use Research and Development Engine / vehicle calibration Road to rig Environmental research NRMM Non road mobile machinery 5

6 2. RDE for LDV in EU

7 RDE-LDV Legislation Four regulatory packages 1 st Package 2 nd Package 3 rd Package 4 th Package Development of basic technical test procedure w/o quantitative requirements Definition of not-toexceed (NTE) emission limits for RDE testing Trip Dynamics Cumulative positive elevation gain PN PEMS testing Vehicle cold start Regeneration event RDE testing for hybrids CoC (certificate of Conformity) In-use-conformity testing by OEMs and authority Surveillance testing by third party

8 Implications of 1 st Regulatory package Boundary conditions and test procedure (*) Initial derogation until 2019/20 Moderate : 3 to 30 C Extended : - 2 to 35 C Altitude Moderate : < 700m Extended : m Correction (1.6) Temperature (*) Moderate : 0 to 30 C Extended : - 7 to 35 C Fuel Market fuels NOx correction factor Not applicable Air Conditioning Normal operation Road Conditions Daylight conditions Only on paved road (not off road) Road Trip Requirements Time : min Road Type Contributions (% dist.) - Urban: 34 ± 10% (never < 29%) - Rural: 33 ± 10% - Motorway: 33 ± 10% Etc Cold start Must be recorded but excluded from data evaluation DPF Regeneration Test voided if regeneration occurs Possibility to repeat Should regeneration occurs in the test repetition, then pollutants emissions are valid measurements Exhaust flow measurement EFM must be used for TA ECU based exhaust flow can be used for other PEMS tests Road Speed Urban < 60 km/h Rural km/h Motorway > 90 km/h Max. speed < 145 km/h (can be exceeded by up to 15 km/h for < 3% of total duration of motorway driving) Etc

9 Implications of 2 nd Regulatory package Requirements introduced in two steps 1 st step From 1 st September 2017 for new models From 1 st September 2019 for new vehicles 2 nd step From 1 st January 2020 for new models From 1 st January 2021 for new vehicles Conformity Factor for NOx = 2.1 Vehicles will be allowed for exceeding the applicable NOx emissions limit (i.e. 80 mg/km for EU6) by 110%. The aim is to give manufacturers time to gradually adapt to the new RDE rules. Conformity Factor for NOx = Error Margin Vehicles will be allowed for exceeding the applicable NOx emissions limit (i.e. 80 mg/km for EU6) by 50%. This CF will be annually reviewed to take into consideration technical improvements to test equipment.

10 Implications of 3 rd Regulatory package PN-PEMS (Portable Emission Measurement System for Particle Number) JRC RDE PN-PEMS program assessing performance of various PN-PEMS equipment Theoretical evaluation of Diffusion Chargers (DC) (2013) Phase I (2013): Feasibility study Phase II (2014): Extensive experimental campaign Inter-laboratory correlation exercise ILCE (2015) ( ( (reports still to be issued soon ) What is confirmed Conformity Factor for PN = From 1 st September 2017 for new models From 1 st September 2018 for new vehicles 10

11 Implications of 3 rd Regulatory package Vehicle Cold Start (*) Background (*) The cold start period covers the first 5 minutes after initial start of the combustion engine. If the coolant temperature can be reliably determined, the cold start period ends once the coolant has reached 343 K (70 C) for the first time but no later than 5 min after initial engine start. As part of the 1 st RDE package, cold start (*) emissions are recorded but excluded from data evaluation Reasons: No Vehicle conditioning requirements, poor repeatability, small share of the overall emissions Revisions for Including Cold Start Approved Vehicle Conditioning (5.3) Driven for > 30 min 6 56 h at moderate or extended conditions No harsh conditions Requirement to start the trip with urban part (6.2) Limited Idling (7.6) Cold start included in data evaluation Using a correction factor (1.6) if vehicle has been conditioned for >3 h in extended conditions Additional Warm Start test 11

12 Implications of 3 rd Regulatory package Periodically regenerating systems All results will be corrected with the K i factors Possible results: What is confirmed Vehicle below the limit pass Vehicle above the limit Check if regeneration occurred If not failed If yes remove K i factor, if now below the limit pass If yes remove K i factor, but still above the limit complete regeneration and repeat the test once 12

13 Implications of 3 rd Regulatory package Testing of Hybrids (*) Moving Averaging Windows/ Standardize Power Frequency Background RDE data evaluation methods (MAW/SPF) (*) verifies normality of test conditions with the assumption that CO 2 is a reliable proxy of work/power Approach is valid for conventional ICE vehicles but may not be applicable to hybrid vehicles yielding biased results What is confirmed New appendix 7c for OVC-HEVs (Off-vehicle chargingy hybrid electric vehicles) Only OVC-HEVs are included Recommended to start in charge-sustaining mode Minimum use of the combustions engine in urban conditions Need to be reviewed to create a more complete method 13

14 4 th Regulatory package In-use-conformity testing To be done by OEM and Type Approval (TA) authority To assess durability of emission control systems over certain periods of use Similar philosophy as type I in-use-conformity laboratory testing «RDE-LDV regulation is based on the legal requirement that NTE emission limits are not exceeded for a whole variety of different PEMS trips» Surveillance testing Done by a third party e.g. NGO(s), authority not involved in initial TA Decisive for the effectiveness of RDE-LDV regulation requirement At Type Approval, this requirement is only demonstrated, not proven

15 4 th Regulatory package MAW EMROAD, SPF dropped? Definition of window a) Window = half of CO 2 total mass [g] emitted by the vehicle over WLTP cycle b) Every 1 Hz a new window is build M CO2 [g] cumulated ½ CO2 (WLTC) [g] [ ] Time [s] 15

16 3. RDE for HD in EU

17 EU HD PEMS Already a long experience Regulation EC No 582/2011 PEMS for EURO VI HD engine In-Service-Conformity Regulation EC No 64/2012 PEMS ISC test as part of the Type Approval Regulation EC No 2016/1718 Step D for new types for new vehicles EU-PEMS PM Pilot Program (2008) dropped HD PN-PEMS program (2015) application date 1/9/2018? 17

18 EU HD PEMS Main Changes in Step D Low Power Vehicle Operation - Reducing the % of engine power threshold down from 20% to 10% - CF 90 th percentile reporting retained Influence of vehicle payload % payload at the nomination of the Type Approval Authority (before 50-60%) Mininum Sampling Duration - 5xWTHC 4-7xWHTC Work or CO2 reference. Cold Start Emissions - Still excluded from Validation, Start of measurement C Influence of the test route - Urban -> Rural -> Motorway order mandated 18

19 EU HD PEMS Aver. Real-worl Nox emissions (g/km) for LD and HD diesel Veh. Euro 5/V and Euro 6/VI 19

20 4. RDE for HD in US

21 HDIUT Regulation Manufacturer-Run Heavy-Duty In-Use Testing (HDIUT) Overview History The HDIUT program was established as a CARB and EPA joint regulatory effort Purpose: To assure that engines meet applicable emission standards throughout their useful life gaseous pilot years, manufacturers had to conduct testing and report data, but no enforcement 2007 first gaseous enforceable year and particle mass (PM) pilot Details EPA/CARB annually select engine families and send test orders to manufacturers Manufacturers recruit trucks from existing customers PEMS installed on vehicles prior to planned operation Vehicles must be operated by customer provided drivers on regular routes Test validity: 3+ hours non-idle vehicle operation with PEMS fully functioning Evaluation method: NTE >90% pass ratio General Reference: CARB Heavy-Duty In-Use Compliance/Testing/Not-to-Exceed Workgroup February 22, 2017 staff presentation ( 21

22 HDIUT Regulation Explanation of NTE NTE Boundaries (Zone) > 30% max power > 30% max torque > 15% European Stationary Cycle speed Temperature Conditions > 250 degc exhaust temperature (if SCR) > minimum intake manifold or coolant temperatures NTE Validity = minimum 30 consecutive seconds while in the NTE zone and meeting the temperature conditions General Reference: CARB Heavy-Duty In-Use Compliance/Testing/Not-to-Exceed Workgroup February 22, 2017 staff presentation ( 22

23 5. RDE for NRMM in EU

24 NRMM Stage V REGULATIONS : ISM 13 April 2017 : EU Stage V Regulation (EU) 2016/1628 for Non-Road Mobile Machinery (NRMM) engines were published in the Official Journal (OJ) Came into force on 3 rd May /1628 is supplemented by 2017/654 : technical requirements ref emission limits and type-approval of NRMM engines test methods relating to emission limits EU type-approval procedures for internal combustion engines for NRMM arrangements with regard to conformity of production The requirements and procedures relating to technical services for those engines. 2017/655 : monitoring of gaseous pollutant emissions from in-service engines installed in NRMM arrangements with regards to the selection of engines test procedures and reporting of results relating to monitoring of gaseous pollutant emissions from in-service NRMM engines using Portable Emissions Measurement Systems (PEMS) in an Annex

25 What Does NRMM Legislation Cover? Overview 25

26 EU Non Road Engines Categories for In Service Monitoring Emission Limits Stage V REGULATION (EU) 2016/1628 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 14 September 2016 Category Ignition Net Power CO HC NOx PM PN Date kw g/kwh n/kwh NRE-v7c-1 CI P < NRE-v7c-2 CI 8 P < NRE-v7c-3 CI 19 P < x10 12 NRE-v7c-4 CI 37 P < x10 12 NRE-v7c-5 All 56 P < x10 12 NRE-v7c-6 All 130 P < x10 12 NRE-v7c-7 All P >

27 Issues for PEMS for NRMM Packaging Virtually no space in the operator cab area so external mounting on the vehicle is most likely Use of enclosures that are rain/splash proof and also sealed against dust Anti-vibration / shock mounting is necessary for off-road (need to make preparatory evaluation of the In Service Monitoring application) PEMS Operation Vehicle operator cannot operate the PEMS system and the vehicle Remote control and monitoring using wireless communications with chase vehicles Lack of signals for engine power determination Some NRMM category vehicles may not have the necessary ECU signals for the determination of engine power So cannot calculate emissions on g/kw.hr base Alternative expressions of specific exhaust emissions necessary (g/kg fuel or g/kg CO2)

28 Contact Markus Böck HORIBA GmbH Kaplanstraße Tulln Austria markus.boeck@horiba.com web: